Key result
Heavy activities of daily living elicited significantly higher cardiac work compared to light activities in healthy young adults, with the triple product showing greater discriminatory ability.
Why the study?
Habitual daily activities may cause significant cardiovascular responses relevant to coronary artery disease, but the cardiac work for various activities of daily living was not determined.
How do different intensities of daily activities affect cardiovascular responses and cardiac work in young healthy adults?
Observational (n=42)
How do different intensities of daily activities affect cardiovascular responses and cardiac work in young healthy adults?
The triple product of systolic blood pressure and cardiac output provides a sensitive measure of cardiac work across varying intensities of daily activities.
Answers are grounded in this paper and cite their sources.
Triple product may aid cardiac work assessment during daily activities; hypothesis-generating in healthy young adults and requires validation before broader use.
BACKGROUND: Studies suggest that habitual daily activities may result in significant cardiovascular responses that might have implications for individuals with coronary artery disease. This study determined the cardiac work for various activities of daily living among healthy young participants. METHODS: We evaluated cardiovascular responses in 42 young adults (21 male, 21 female) to graded activities. Subjects were divided into three groups. In each group, one light, one moderate, and one heavy activity were performed based on published METS. Cardiovascular responses were evaluated using impedance cardiography (BOMED Instruments, USA) and automated blood pressure monitor (Welch Allyn, USA). Cardiac work was computed as the double product (heart rate × systolic blood pressure) and triple product (systolic blood pressure × cardiac output [stroke volume × heart rate]). Perceived exertion was evaluated using Borg's scale. RESULTS: There was high inter-individual variability in cardiovascular responses for each activity. There were, by and large, no gender differences across the activities. Cardiac work was significantly higher with heavy activities than light activities using both indices; however, the triple product showed greater discriminatory ability in evaluating differences in cardiac work across all categories of activities. CONCLUSION: The data suggest a need to develop a compendium of cardiac work related to habitual activities to guide doctors and patients.
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Fredrick et al. (2019) conducted an observational in Healthy (n=42). Graded activities of daily living (light, moderate, heavy) vs. Comparison across activity intensities was evaluated on Cardiac work (double product and triple product) and perceived exertion. Heavy activities of daily living elicited significantly higher cardiac work compared to light activities in healthy young adults, with the triple product showing greater discriminatory ability.
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